:root{
  --gold:#c9a04a;--gold-2:#b38a33;--gold-soft:rgba(201,160,74,.14);
  --bg:#f7f6f2;--surface:#ffffff;--surface-2:#f1efe8;--text:#16201d;--muted:#5d6763;--border:#e3e0d6;
  --brand:#0b2a24;--shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05);
  --radius:14px;--maxw:1080px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",Roboto,sans-serif;
}
:root[data-theme="dark"]{
  --bg:#0d1110;--surface:#151b19;--surface-2:#1c2421;--text:#ebe8df;--muted:#9aa39f;--border:#27312d;
  --brand:#ebe8df;--gold-soft:rgba(201,160,74,.16);--shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.65;font-size:16px}
a{color:inherit}
a:hover{color:var(--gold)}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--gold);color:#000;padding:6px 10px;border-radius:6px;z-index:9}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.site-header .wrap{display:flex;align-items:center;gap:18px;height:62px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0}
.logo img{height:34px;width:auto;display:block}
.logo .logo-dark{display:none}
:root[data-theme="dark"] .logo .logo-light{display:none}
:root[data-theme="dark"] .logo .logo-dark{display:block}
.logo-tag{font-size:13px;font-weight:700;color:var(--gold);border:1px solid var(--gold);border-radius:6px;padding:0 6px;line-height:20px}
.tool-nav{display:flex;gap:4px;margin-left:8px;overflow-x:auto;scrollbar-width:none}
.tool-nav::-webkit-scrollbar{display:none}
.tool-nav a{white-space:nowrap;text-decoration:none;font-size:15px;color:var(--muted);padding:6px 12px;border-radius:999px}
.tool-nav a[aria-current="page"]{color:var(--text);background:var(--gold-soft);font-weight:600}
.tool-nav a.soon{opacity:.55;pointer-events:none}
.header-right{margin-left:auto;display:flex;align-items:center;gap:8px;flex-shrink:0}
.btn-ghost{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:999px;height:36px;padding:0 14px;font-size:14px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.btn-ghost:hover{border-color:var(--gold);color:var(--text)}
.theme-btn{width:36px;padding:0;justify-content:center}
.theme-btn .i-sun{display:none}
:root[data-theme="dark"] .theme-btn .i-sun{display:block}
:root[data-theme="dark"] .theme-btn .i-moon{display:none}

/* hero */
.hero{padding:34px 0 10px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:8px}
.crumbs a{text-decoration:none}
h1{font-size:clamp(26px,4vw,36px);line-height:1.25;margin:0 0 10px;letter-spacing:.5px}
h1 .ox{color:var(--gold)}
.lead{color:var(--muted);margin:0;max-width:760px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.badge{font-size:13px;padding:3px 10px;border-radius:999px;background:var(--gold-soft);color:var(--text);border:1px solid color-mix(in srgb,var(--gold) 35%,transparent)}

/* cards & layout */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
section{margin:22px 0}
h2{font-size:22px;margin:0 0 12px}
h3{font-size:17px;margin:18px 0 6px}
.muted{color:var(--muted)}
.small{font-size:13px}

/* calculator */
.calc{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}
.controls{display:flex;flex-wrap:wrap;gap:14px 22px;align-items:center;margin-bottom:14px}
.seg{display:inline-flex;border:1px solid var(--border);border-radius:999px;padding:3px;background:var(--surface-2)}
.seg button{border:0;background:transparent;color:var(--muted);font-size:14px;padding:6px 16px;border-radius:999px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.field{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.field input{width:84px;height:34px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);padding:0 8px;font-size:15px}
.field input:focus,.seg button:focus-visible{outline:2px solid var(--gold);outline-offset:1px}
.group-title{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--gold-2);margin:16px 0 6px;text-transform:uppercase}
:root[data-theme="dark"] .group-title{color:var(--gold)}
.plans{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:8px}
.plan{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--border);border-radius:10px;padding:10px 12px;cursor:pointer;background:var(--surface);transition:border-color .15s,background .15s}
.plan:hover{border-color:color-mix(in srgb,var(--gold) 60%,var(--border))}
.plan:has(input:checked){border-color:var(--gold);background:var(--gold-soft)}
.plan input{margin-top:4px;accent-color:var(--gold);width:16px;height:16px;flex-shrink:0}
.plan .name{font-weight:600;font-size:15px;line-height:1.35}
.plan .price{font-size:13px;color:var(--muted)}
.plan .price b{color:var(--text);font-weight:600}
.plan .tip{font-size:12px;color:var(--muted);margin-top:2px}
.summary{position:sticky;top:78px}
.summary .total{font-size:34px;font-weight:800;line-height:1.15;margin:4px 0}
.summary .total small{font-size:15px;font-weight:600;color:var(--muted)}
.summary .sub{font-size:15px;color:var(--muted)}
.summary .row{display:flex;justify-content:space-between;gap:10px;font-size:14px;padding:6px 0;border-top:1px dashed var(--border)}
.summary .row:first-of-type{border-top:0}
.summary ul{list-style:none;padding:0;margin:10px 0 0;max-height:260px;overflow:auto}
.sel-list li{display:flex;justify-content:space-between;gap:8px;font-size:13px;padding:4px 0;border-bottom:1px solid var(--border)}
.sel-list li span:last-child{white-space:nowrap}
.flag{display:inline-block;font-size:11px;color:var(--gold-2);border:1px solid var(--gold);border-radius:4px;padding:0 4px;margin-left:4px}
.save{color:#2f8f5b;font-weight:600}
:root[data-theme="dark"] .save{color:#5cc48b}
.share-box{margin-top:14px;padding:14px;border-radius:10px;background:var(--surface-2)}
.share-box .big{font-size:22px;font-weight:700}
.updated{font-size:13px;color:var(--muted);margin-top:12px}
.btn-row{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}

/* recommend */
.reco{display:flex;gap:18px;align-items:center;border:1px solid color-mix(in srgb,var(--gold) 55%,var(--border));background:linear-gradient(135deg,var(--gold-soft),transparent 70%),var(--surface)}
.reco .ad-label{font-size:12px;color:var(--muted);border:1px solid var(--border);border-radius:4px;padding:0 6px}
.reco h2{margin:6px 0}
.btn-gold{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--gold);color:#16120a;font-weight:700;text-decoration:none;border-radius:999px;padding:10px 20px;white-space:nowrap;border:0;cursor:pointer;font-size:15px}
.btn-gold:hover{background:var(--gold-2);color:#16120a}
.disclosure{font-size:12px;color:var(--muted);margin-top:8px}

/* faq / articles */
.faq details{border-top:1px solid var(--border);padding:10px 0}
.faq details:first-of-type{border-top:0}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:6px 0 0;color:var(--muted)}
.articles{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.articles a{display:block;text-decoration:none;border:1px solid var(--border);border-radius:10px;padding:12px 14px;background:var(--surface)}
.articles a:hover{border-color:var(--gold)}
.articles a span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.sources{font-size:13px}
.sources table{width:100%;border-collapse:collapse}
.sources th,.sources td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--border);vertical-align:top}
.sources td a{word-break:break-all}
.table-scroll{overflow-x:auto}

/* index */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.tool-card{display:flex;flex-direction:column;gap:6px;text-decoration:none}
.tool-card .ico{width:44px;height:44px;border-radius:12px;background:var(--gold-soft);display:grid;place-items:center;font-size:22px}
.tool-card h2{font-size:19px;margin:6px 0 0}
.tool-card p{margin:0;color:var(--muted);font-size:14px}
.tool-card .go{margin-top:auto;padding-top:8px;color:var(--gold-2);font-weight:600;font-size:14px}
:root[data-theme="dark"] .tool-card .go{color:var(--gold)}
a.tool-card:hover{border-color:var(--gold)}
.tool-card.soon{opacity:.7}
.tool-card.soon .go{color:var(--muted)}

/* footer */
.site-footer{margin-top:40px;border-top:1px solid var(--border);padding:24px 0 34px;color:var(--muted);font-size:14px}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between}
.site-footer a{text-decoration:none}
.site-footer nav{display:flex;gap:16px;flex-wrap:wrap}

@media (max-width:900px){
  .calc{grid-template-columns:1fr}
  .summary{position:static}
}
@media (max-width:640px){
  .wrap{padding:0 14px}
  .site-header .wrap{height:auto;flex-wrap:wrap;gap:6px 10px;padding-top:8px;padding-bottom:8px}
  .logo img{height:28px}
  .tool-nav{order:3;width:100%;margin-left:0}
  .back-link .txt{display:none}
  .reco{flex-direction:column;align-items:flex-start}
  .card{padding:16px}
  .plans{grid-template-columns:1fr}
  .hero{padding-top:20px}
}
@media print{.site-header,.reco,.site-footer{display:none}}
.plan .name,.plan .price,.plan .tip{display:block}
.plan .name{margin-bottom:1px}
.mbar{display:none}
@media (max-width:900px){
  .mbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;align-items:center;justify-content:space-between;gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--gold);box-shadow:0 -4px 16px rgba(0,0,0,.08)}
  .mbar b{font-size:20px}
  .mbar a{font-size:14px;color:var(--gold-2);text-decoration:none;font-weight:600}
  body.has-mbar{padding-bottom:70px}
}
/* ---- image watermark tool ---- */
.wm-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;align-items:start}
.dropzone{border:2px dashed color-mix(in srgb,var(--gold) 55%,var(--border));border-radius:var(--radius);padding:30px 16px;text-align:center;background:var(--surface);transition:background .15s}
.dropzone.over{background:var(--gold-soft)}
.dropzone .big{font-size:18px;font-weight:700;margin:0 0 6px}
.pick-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:14px 0 8px}
.pick-row label{cursor:pointer}
.pick-row input{position:absolute;opacity:0;width:1px;height:1px}
.privacy{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#2f8f5b;font-weight:600}
:root[data-theme="dark"] .privacy{color:#5cc48b}
.set-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;padding:9px 0;border-top:1px solid var(--border);font-size:14px}
.set-row:first-child{border-top:0}
.set-row>.lbl{width:76px;color:var(--muted);flex-shrink:0}
.set-row input[type=number],.set-row input[type=text],.set-row select{height:32px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);padding:0 8px;font-size:14px}
.set-row input[type=number]{width:76px}
.set-row input[type=text]{flex:1;min-width:120px}
.set-row input[type=range]{flex:1;min-width:100px;accent-color:var(--gold)}
.set-row input[type=radio],.set-row input[type=checkbox]{accent-color:var(--gold)}
.set-row label{display:inline-flex;align-items:center;gap:4px;cursor:pointer}
.set-row .note{width:100%;font-size:12px;color:var(--muted);padding-left:88px}
.is-off{opacity:.45}
.progress{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin:12px 0 6px}
.progress #bar{height:100%;width:0;background:var(--gold);transition:width .2s}
.res-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin-top:12px}
.res{padding:10px;font-size:13px}
.res .thumb{display:block;aspect-ratio:4/3;background:repeating-conic-gradient(var(--surface-2) 0 25%,transparent 0 50%) 0 0/16px 16px;border-radius:8px;overflow:hidden;margin-bottom:8px}
.res img{width:100%;height:100%;object-fit:contain;display:block}
.res-name{font-weight:600;word-break:break-all;line-height:1.4}
.res-meta{color:var(--muted);margin-top:2px}
.res-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.res-links a{font-size:12px;color:var(--gold-2);text-decoration:none;border:1px solid var(--gold);border-radius:6px;padding:1px 6px}
:root[data-theme="dark"] .res-links a{color:var(--gold)}
.res.err{border-color:#c0392b}
.grow{color:#c0392b}
.btn-gold:disabled,.btn-ghost:disabled{opacity:.45;cursor:not-allowed}
.ymt{display:flex;gap:16px;align-items:center;border:1px solid #8b0000;background:linear-gradient(135deg,rgba(139,0,0,.07),transparent 70%),var(--surface)}
.ymt h2{color:#8b0000;margin:6px 0 4px}
:root[data-theme="dark"] .ymt h2{color:#e0625a}
.btn-red{display:inline-flex;align-items:center;background:#8b0000;color:#fff;text-decoration:none;font-weight:700;border-radius:999px;padding:10px 20px;white-space:nowrap}
.btn-red:hover{background:#6d0000;color:#fff}
@media (max-width:900px){.wm-layout{grid-template-columns:1fr}}
@media (max-width:640px){.ymt{flex-direction:column;align-items:flex-start}.set-row .note{padding-left:0}.res-grid{grid-template-columns:1fr 1fr}}
/* ---- pdf tools ---- */
.ptabs{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 12px}
.ptabs::-webkit-scrollbar{display:none}
.ptab{flex-shrink:0;border:1px solid var(--border);background:var(--surface);color:var(--muted);border-radius:999px;padding:8px 16px;font-size:15px;cursor:pointer}
.ptab[aria-selected="true"]{background:var(--gold);border-color:var(--gold);color:#16120a;font-weight:700}
.ppanel h2{margin-bottom:12px}
.pdrop{padding:22px 16px}
.pdrop label input{position:absolute;opacity:0;width:1px;height:1px}
.pdrop label{cursor:pointer}
.ptools{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;margin:12px 0;font-size:14px}
.ptools label{display:inline-flex;align-items:center;gap:4px;cursor:pointer}
.ptools input[type=radio]{accent-color:var(--gold)}
.ptools select,.ptools input[type=text],.ptools input[type=number]{height:34px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);padding:0 8px;font-size:14px}
.ptools .btn-ghost{height:34px;padding:0 12px}
.flist{list-style:none;padding:0;margin:10px 0;display:flex;flex-direction:column;gap:6px}
.fitem{display:flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:10px;padding:8px 10px;background:var(--surface);cursor:grab}
.fitem.dragging{opacity:.5;border-color:var(--gold)}
.fitem .grip{color:var(--muted);letter-spacing:-2px}
.fitem .fmain{flex:1;min-width:0;display:flex;align-items:center;gap:10px}
.fitem .fmain b{display:block;word-break:break-all;font-size:14px;font-weight:600}
.fitem .fmain .small{display:block}
.fthumb{width:44px;height:44px;object-fit:cover;border-radius:6px;flex-shrink:0;background:var(--surface-2)}
.fbtns{display:flex;gap:4px;flex-shrink:0}
.fbtns button{width:32px;height:32px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer}
.fbtns button:disabled{opacity:.35;cursor:default}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin:10px 0}
.pthumb{position:relative;border:2px solid var(--border);border-radius:10px;background:var(--surface);padding:8px 8px 26px;cursor:pointer;color:var(--text)}
.pthumb.sel{border-color:var(--gold);background:var(--gold-soft)}
.pthumb.del .pbox{opacity:.25}
.pthumb.del::after{content:"已删除";position:absolute;top:40%;left:50%;transform:translate(-50%,-50%);background:#c0392b;color:#fff;font-size:12px;padding:2px 8px;border-radius:4px;white-space:nowrap}
.pbox{display:grid;place-items:center;height:150px;overflow:hidden}
.pimg{max-width:100%;max-height:150px;box-shadow:0 1px 4px rgba(0,0,0,.2);transition:transform .2s;background:#fff}
.pimg.ph{width:100px;height:140px;background:var(--surface-2)}
.pno{position:absolute;bottom:5px;left:0;right:0;text-align:center;font-size:13px;font-weight:600}
.prot{position:absolute;top:4px;right:6px;font-size:12px;color:var(--gold-2);font-weight:700}
.status{margin-top:8px;min-height:1.4em}
.status.ok{color:#2f8f5b}.status.err,.status.enc{color:#c0392b;font-weight:600}.status.warn{color:#b07a12}
:root[data-theme="dark"] .status.ok{color:#5cc48b}:root[data-theme="dark"] .status.err,:root[data-theme="dark"] .status.enc{color:#ff7a6b}:root[data-theme="dark"] .status.warn{color:#e2b14d}
.result{margin-top:10px;display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.result .dl{white-space:normal;text-align:left}
.warnbox{font-size:13px;border:1px solid #e2b14d;background:rgba(226,177,77,.12);border-radius:10px;padding:10px 12px;margin:8px 0}
.cmp-box{display:flex;gap:18px;font-size:15px}
.img-prev{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;width:100%}
.img-prev figure{margin:0;border:1px solid var(--border);border-radius:8px;padding:6px;background:var(--surface)}
.img-prev img{width:100%;height:160px;object-fit:contain;display:block;background:#fff}
.img-prev figcaption{font-size:12px;color:var(--muted);margin-top:4px}
.is-busy{cursor:progress}
@media (max-width:640px){.ptab{padding:7px 12px;font-size:14px}.pgrid{grid-template-columns:repeat(3,1fr)}.pbox{height:110px}.pimg{max-height:110px}.pimg.ph{width:70px;height:100px}.ptools .btn-ghost{flex:1 1 auto}}